Can I take Co-codamol and Lansoprazole together?
Drug interaction guide
Originally published 14 Mar 2026
Meets Patient’s editorial guidelines
- DownloadDownload
- Share
- Language
- Discussion
- Audio Version
There is no direct harmful interaction between co-codamol and lansoprazole. However, co-codamol contains codeine, which can cause constipation. Lansoprazole is often used to treat stomach issues, and while it doesn't interact with the medicine itself, the side effects of codeine might complicate certain digestive conditions.
In this article:
Video picks for Drug interactions
Continue reading below
Why this happens
Lansoprazole reduces stomach acid (a proton pump inhibitor), while co-codamol is a combination of paracetamol and codeine. These drugs are processed by different pathways in the liver and do not significantly interfere with each other's absorption or effectiveness.
What you should do
Back to contentsIt is generally safe to take these two medicines together. If you are taking lansoprazole for an ulcer or severe indigestion, be aware that the codeine in co-codamol can cause constipation, which may cause abdominal discomfort. Drink plenty of water and speak to a pharmacist if you experience constipation.
Continue reading below
Using other medicines
Back to contentsTaking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Disclaimer
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
Patient picks for Drug interactions

Treatment and medication
Can I take Allerwel am and Calpol together?
There are no known harmful interactions between Allerwel AM and Calpol. It is generally safe to take these two medicines together as long as you follow the recommended doses for each.

Treatment and medication
Can I take Aged garlic extract and Calcium together?
There is no known significant interaction between aged garlic extract and calcium supplements. They are generally considered safe to take together.
Continue reading below
Article history
The information on this page is written and peer reviewed by qualified clinicians.
14 Mar 2026 | Originally published

Ask, share, connect.
Browse discussions, ask questions, and share experiences across hundreds of health topics.

Feeling unwell?
Assess your symptoms online for free
Sign up to the Patient newsletter
Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.
By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.